Andy,War in the Southern Oceans, by Turner, L C F & HR Gordon-Cumming & JE Betzler. Published by Oxford University Press, Capetown, 1961. xvi+288. There are several copies listed on http://used.addall.com/ for less than $100US; from stores in England, SA, Germany, etc. This is one of the three original Official Histories from South Africa. I don't think the subsequent Official History from South Africa has anything so specific.